I tend to leave my Biology and HHD textbook at home and use digital copies at school. My Bio textbook is like 700 pages on thick paper, so there's no way known I am lugging that to and from school.
In terms of how I use my locker, I have some spare loose leaf and plastic pockets in there and it stores my bag and books I need for that day. When I have Lit or English questions, I don't take my folders home unless I absolutely need them, because we have a class Evernote page and my teacher puts the questions on there. So I just take my laptop and the text itself home

For HHD, if it's some questions on a handout I will usually just take home the sheet in a plastic pocket because I can't be bothered taking home my folder unless I absolutely need to. Definitely helps in reducing the amount of stuff to take home.
At the moment, about 3/4 of my locker is food and the other 1/4 is books. #Year12life